Smoke and gas consuming furnace



'(No. Modet.) 2 Sheets-Sheet 1.

t DE WITT C. HILL.

SMOKE AND GAS GONSUMING FURNACE.

Patented Sept. 12, 1882.

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DE WITT HILL.

SMOKE AND GAS GONSUMING FURNACE.

No. 264,158. Patented Sept. 12,1882,

o o a a O 0 0 c UNITED STATES ATENT FFICE.

DE WITT C. HILL, OF WILLIMANTIC, CONNECTICUT, ASSIGNOR OF TVVO-THIRDS TO JOHN SCOTT, OF SAME PLACE, AND WILLIAM E. BARROWS, OF HART- FORD, CONNECTICUT.

SMOKE AND GAS CONSUMING FURNACE.

SPECIFICATION formingpart of Letters Patent No. 264,158, dated September 12, 1882.

Application filed August 25, 1881.

To all whom it may concern Be it known that I, DE WITT CLINTON HILL,

a citizen ofthe UnitedStates, residing at Willimantic, in the county of Windham and State of Connecticut, have invented a new and useful Improvement in Smoke and Gas Consuming Furnaces, of which the following is aspecification, reference being had to the accompanying drawings.

My invention relates to means for increasing the heat of the air which is introduced into the combustion-chamber of a smoke and gas consuming furnace of the construction hereinafter set forth; and it consists in air receivers and heaters placed in the uptake or flue leading from the tubes of the boiler, and in passages in the front of the furnace, through which the air may pass, and in which it may be heated before entering the ducts or fines in the side walls of the furnace.

In the drawings, (two sheets,) Figure l is a front view of a furnace embodying my invention, a part being in section. Fig. 2 is a vertical section taken in the direction of line 1 1 in Fig. 1. Fig. 3 is a central vertical section,

and Fig. 4 is a horizontal section.

In the side walls, A A, of the furnace, as furnaces to which my improvement is applied are now constructed, are the ducts or fines B 0 B C C. The fines B B lead from, the front of the furnace to the openings or perforated plates D D into the combustion-chamber, and the fines C C lead also from the front of the fur nace to the combustion-chamber, but through 3 5 openings or perforated plates E in the bridgewall F. These ducts or fines, which wind back and forth in the walls, as shown, have hitherto in this style of furnace received the air at the front of the furnace directly from the atmos- 0 phere, and conducted the same to the combustion-chamber, heated only to that degree which is possible by passing through said ducts or fines.

I have found that the air after passing through said ducts or fines, when received by them at the temperature of the atmosphere,

does not possess that amount of heat whereby it may cause that degree of consumption of the smoke and gases which is desirable. I have (No model.)

also found that the air admitted to the com- 0 bustion-chamber may hold a greater amount of heat, and when so heated the consumption of the smoke and gases is greatly increased. To accomplish this result 1 heat the air before it passes into the ducts or lines in the walls of the furnace. I

I place in the uptake at the head ofthe boiler G air receivers and heaters, as many as are desirable-two, H and I, in this case. A passage, (t, opening outward, conducts the air of the atmosphere to the receiver and heater H. The two receivers H and I are connected by pipes or ducts b b, and by pipes or fines 0 c to passages d, which are formed in the doublewalled iron front J of the furnace, and lead downward, as shown. From the passages d the air passes to the ducts or fines B B C C in the walls of the furnace. The air, having passed through passage or, heaters H and I, fines and passages b, c, and (Z, enters the ducts 7c and fines in the walls of the furnace at a high degree of heat, and enters the combustionchamber and mingles with the flame and gases at a much greater heat than it would had it not been heated before passing into the ducts or fines in the walls.

The heat thus utilized is that which might otherwise be lost, not only because taken from the uptake or passage leading from the tubes of the boiler, but also since it is that which ordinarily escapes in a great measure by radiation at the front of the boiler and furnace.

I claim as my invention- 1. In a furnace having air ducts or fines winding back and forth in' the side walls, and

leading to openings or perforated plates located with reference to the combustion-chamher, as specified, the combination of one or more air receivers or heaters located in the uptake, said air ducts or fines and air-passages 9o connecting said'air receivers or heaters and said .ducts or fines, substantially as and for the purpose set forth.

2. In combination with air ducts or fines winding back and forth in the side walls of a 5 furnace, and leading to openings in perforated plates located with reference to the combustion-chamber, as specified, one or more heaters placed in the uptake, and air-passages in in the uptake, having one or more openings the front of the furnace, substantially as and outward, passages d in the double front J, and 10 for the purpose set forth. ducts or flues B G in the side Walls, substan- 3. The combination of the heaters H and I, tially as described. 5 passage a, pipes b, pipes 0, passages d in the I DE YVITT CLINTON HILL.

double front J, and ducts or lines B G in the WVitnesses: side walls, substantially as described. lRAD W. STORES, 4. The combination of oneor more heaters l HUBER CLARK. 

